Polygon POS API by Etherscan
The complete API for Polygon POS data
Query Polygon POS balances, transactions, tokens, contracts, and logs using the same Etherscan API that powers PolygonScan, with one API key and chainid=137.
Trusted by teams at
Polygon POS Network
● Live
Balances
Tokens
Contracts
Logs
and more..
137
Polygon POS Mainnet chain ID
80002
Polygon POS Testnet chain ID
60+ EVM Chains
with one API key
99.99%
uptime status
Why teams choose Etherscan API for Polygon POS data
Explorer-grade blockchain data for teams that need accuracy, coverage, scale, and a clear path to multichain data from day one.
The first-choice API for Polygon POS data
When teams need blockchain data they can defend in front of users, finance, or compliance, they start with the Etherscan API.
The reference layer for onchain data
Built with PolygonScan data, the API is used as a reference point to verify balances, transfers, internal transactions, and contract activity on Polygon POS.
Accuracy that holds up under scrutiny
Capture edge cases many providers miss and reduce time spent reconciling mismatched records across tools.